Incorrect parser diagnostic message for duplicate export modifier #15870
Description
export export function foo() {
}
Reports:
x TS(1029): 'export' modifier must precede 'declare' modifier.
,-[:1:8]
1 | export export function foo() {
: ^^^^^^
`----
x 'export' modifier cannot be used here.
,-[:1:8]
1 | export export function foo() {
: ^^^^^^
`----
help: Allowed modifiers are: declare, async
We should follow typescript (or better), and do somthing like just report 'export' modifier already seen.